What pump gas should i run on my HO motor? should i just run regular. or Pluse. i only ask because for a while i ran regular and the car didnt act right. then as a test i whent with super. (btw cheep gas like raceway and gulf seem to work best ) and the car seemed peppy and fule lasted longer so i guessed ok the timing was messed with but then i noticed the gass wasnt lasting long. and driving normal. i think it's just that in these winter months they mess with the gas to help it burn in the cold. so i got fed up today and put regular back in and im gonna see how it is.
I have to run premium in my HO 302 or I get detination (spark nock). I also have my base timing set at 13 degrees.factory Base timing of 10 degrees should let you run regular, but of course you'll get more power with a advance in timing. so in that case, mid or premium is the best way to go.
mine runs better with 89 and my timing is like 15* and 89 is cheaper :)
my car runs a million times better with 92 or 93
87 I get little less performance, and get less MPG. Sounds different too. Maybe I'm just imagining.
87: 1.90
92: 2.10
glad my white cougar likes the 87
it all depends on compression ratio and spark timing. higher octane fuel is harder to ignite, so using it in a completely stock engine likely will do more harm than good. now if you bump your timing up and start to detonate, then you have to use higher octane. that's why I laugh at the hondas who steal the 91 octane stickers and put them on their gas cap covers :giggle: